--- title: "En15A — Quenched and tempered steels" description: "En15A in BS: material number 1.1165, also listed as GS-30 Mn 5. Category: Quenched and tempered steels. 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Compare it to detect a real > content change; `generated` moves on every render and is not a change signal. BS · United Kingdom · 56 designations # En15A En15A is a designation in BS for the material held under material number 1.1165, also listed as GS-30 Mn 5. It is a material in the category Quenched and tempered steels. We list 56 designations recorded for this grade, in the standards DIN / EN, UNS, AISI / SAE, BS, AFNOR, UNE, JIS, GB, GOST, UNI, ČSN, PN, MSZ, STAS, BDS, NBN and KS. - [*Material no.* **1.1165**](/materials/material-no/1.1165 "Material no.: 1.1165") - [*Category* **Quenched and tempered steels · 133 grades**](/categories/quenched-and-tempered-steels "Category: Quenched and tempered steels · 133 grades") - *Designations* **56** [Search](/search "Steel grade search")[Inquiry](/inquiry?material=4899dde4-9633-4d2f-a2c8-a0ae635689a6&designation=89692c26-126a-4281-8fa3-8d9e8e25c923 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/bs/en15a.pdf "Datasheet as PDF") ## If you came for one of these The most-used names for this grade. - [DIN / EN G28Mn6 This grade’s own name](/materials/din-en/g28mn6 "DIN / EN G28Mn6") - [UNS D50500 This grade’s own name](/materials/uns/d50500 "UNS D50500") - [GB 80 This grade’s own name](/materials/gb/80 "GB 80") ## About Quenched and tempered steels Quenched and tempered steels are heat-treated steels designed to combine high strength with useful toughness and ductility. They are used for heavily loaded components such as shafts, gears, fasteners and structural machine parts where resistance to mechanical stress is required. This describes the material class as a whole. Always confirm the individual grade against the standard before ordering. ## Also known as 56 designations · 17 standards · nothing hidden This grade’s own name recorded in our sources as this grade’s own designation under that standard. Indicative taken from a published cross-reference table; a close match, not a guarantee of interchangeability. Verify against the mill certificate before ordering. Withdrawn designation no longer current — a separate column from the two above, so a name can be same grade and withdrawn at once. DIN / EN Europe · 3 - [G28Mn6 This grade’s own name](/materials/din-en/g28mn6 "DIN / EN G28Mn6") - [GS-30 Mn 5 This grade’s own name Withdrawn](/materials/din-en/gs-30-mn-5 "DIN / EN GS-30 Mn 5") - [GS-30Mn5V Indicative](/materials/din-en/gs-30mn5v "DIN / EN GS-30Mn5V") UNS United States · 3 - [D50500 This grade’s own name](/materials/uns/d50500 "UNS D50500") - [G13300 Indicative](/materials/uns/g13300 "UNS G13300") - [H1330 Indicative](/materials/uns/h1330 "UNS H1330") AISI / SAE United States · 7 - [1036 Indicative](/materials/aisi-sae/1036 "AISI / SAE 1036") - [1132 Indicative](/materials/aisi-sae/1132 "AISI / SAE 1132") - [1330 Indicative](/materials/aisi-sae/1330 "AISI / SAE 1330") - [1330H Indicative](/materials/aisi-sae/1330h "AISI / SAE 1330H") - [G11320 Indicative](/materials/aisi-sae/g11320 "AISI / SAE G11320") - [G13300 Indicative](/materials/uns/g13300 "AISI / SAE G13300") - [H13300 Indicative](/materials/uns/h13300 "AISI / SAE H13300") BS United Kingdom · 8 - [120M36 Indicative](/materials/bs/120m36 "BS 120M36") - [150M28 Indicative](/materials/bs/150m28 "BS 150M28") - [150M36 Indicative](/materials/bs/150m36 "BS 150M36") - [38Cr2 Indicative](/materials/din-en/38cr2 "BS 38Cr2") - [A5 Indicative](/materials/bs/a5 "BS A5") - [A6 Indicative](/materials/bs/a6 "BS A6") - [En15 Indicative](/materials/bs/en15 "BS En15") - **En15A Indicative** AFNOR France · 3 - [30Mn5 Indicative](/materials/din-en/30mn5 "AFNOR 30Mn5") - [35M5 Indicative](/materials/afnor/35m5 "AFNOR 35M5") - [40M5 Indicative](/materials/afnor/40m5 "AFNOR 40M5") UNE Spain · 6 - [30Mn5 Indicative](/materials/din-en/30mn5 "UNE 30Mn5") - [AM30Mn5 Indicative](/materials/une/am30mn5 "UNE AM30Mn5") - [F.1203 Indicative](/materials/une/f-1203 "UNE F.1203") - [F.1203-36Mn5 Indicative](/materials/une/f-1203-36mn5 "UNE F.1203-36Mn5") - [F.8211 Indicative](/materials/une/f-8211 "UNE F.8211") - [F.8311 Indicative](/materials/une/f-8311 "UNE F.8311") JIS Japan · 6 - [SCMn2 Indicative](/materials/jis/scmn2 "JIS SCMn2") - [SCSiMn2 Indicative](/materials/jis/scsimn2 "JIS SCSiMn2") - [SMn423H Indicative](/materials/jis/smn423h "JIS SMn423H") - [SMn433 Indicative](/materials/jis/smn433 "JIS SMn433") - [SMn433H Indicative](/materials/jis/smn433h "JIS SMn433H") - [SMn438 Indicative](/materials/ks/smn438 "JIS SMn438") GB China · 3 - [30Mn2 Indicative](/materials/gb/30mn2 "GB 30Mn2") - [80 This grade’s own name](/materials/gb/80 "GB 80") - [ZG35SiMn Indicative](/materials/gb/zg35simn "GB ZG35SiMn") GOST Russia / CIS · 4 - [30G2 Indicative](/materials/bds/30g2 "GOST 30G2") - [30GSL Indicative](/materials/gost/30gsl "GOST 30GSL") - [30Г2 Indicative](/materials/bds/30g2 "GOST 30Г2") - [30ГСЛ Indicative](/materials/gost/30gsl "GOST 30ГСЛ") UNI Italy · 2 - [28Mn6 Indicative](/materials/din-en/28mn6 "UNI 28Mn6") - [C28Mn Indicative](/materials/uni/c28mn "UNI C28Mn") ČSN Czechia · 1 - [13141 Indicative](/materials/csn/13141 "ČSN 13141") PN Poland · 1 - [30G2 Indicative](/materials/bds/30g2 "PN 30G2") MSZ Hungary · 2 - [Ao30MnSi5 Indicative](/materials/msz/ao30mnsi5 "MSZ Ao30MnSi5") - [AO35MnSi5 Indicative](/materials/msz/ao35mnsi5 "MSZ AO35MnSi5") STAS Romania · 2 - [T30Mn14R Indicative](/materials/stas/t30mn14r "STAS T30Mn14R") - [T30SiMn12 Indicative](/materials/stas/t30simn12 "STAS T30SiMn12") BDS Bulgaria · 3 - [30G2 Indicative](/materials/bds/30g2 "BDS 30G2") - [30GL Indicative](/materials/gost/30gl "BDS 30GL") - [30GSL Indicative](/materials/gost/30gsl "BDS 30GSL") NBN Belgium · 1 - [28Mn6 Indicative](/materials/din-en/28mn6 "NBN 28Mn6") KS South Korea · 1 - [SCMn2 Indicative](/materials/jis/scmn2 "KS SCMn2") Every designation on file is listed — no truncation, no “+ n more”. Each one is itself a route that leads back here. ## Chemical composition 5 elements on file · weight % What this alloy is Fe Mn Si C Iron — the balance, never listed by a standard — 97.6 % Mn — 1.5 % Si — 0.6 % C — 0.3 % Traces & impurities · 0.1 % Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade. | Element | % by weight | |---|---| | C | 0.25–0.32 | | Si | ≤ 0.6 | | Mn | 1.2–1.8 — Unusual | | P | 0.035 | | S | 0.03 | Carbon Silicon Manganese Phosphorus Sulfur 0.01 % 0.1 % 1 % 10 % 100 % The scale is logarithmic, not the element’s raw share of the alloy — the only honest way to fit 0.01 % and 100 % in one picture, and it means every value here can be compared with every other. | Element | As published source text, verbatim | Min% by weight | Max% by weight | Bound | |---|---|---|---|---| | C | 0,25-0,32 | 0.250 | 0.320 | Range | | Si | ≤0,60 | — | 0.600 | Max | | P | 0,035 | 0.035 | 0.035 | Exact | | S | 0,03 | 0.030 | 0.030 | Exact | | Mn | 1,20-1,80 | 1.200 | 1.800 | Range | The published column is the source string byte-for-byte, decimal comma and all; Min and Max are the parsed bounds. Elements not listed have no value on file — they are omitted, never inferred. ## Predicted transformation temperatures Not enough recorded composition to predict a transformation temperature for this grade — missing: Ni, Cr, Mo. ## Physical & mechanical properties Density 7,85 g/cm³ Exact Weldability difficult to weld As published: hard weldability. Flake sensitivity not susceptible As published: not predisposed Temper brittleness not susceptible As published: not predisposed An absent property means we hold no value for it — it is left out rather than estimated, interpolated from a neighbouring grade, or filled from a handbook. It does not mean the property is undefined for the material. ## Properties by condition 2 conditions · 10 values By dimension**Normalizing 870 - 890°C,Drawing 570 - 600°C** source `splav` | Dimension mm | Rm N/mm² | Re N/mm² | A5% | Z% | KCU kJ/m² | |---|---|---|---|---|---| | to 100 | 589 | 343 | 14 | 25 | 294 | By delivery state**no delivery state stated** source `splav` | Delivery state | Rm N/mm² | Re N/mm² | A5% | Z% | KCU kJ/m² | |---|---|---|---|---|---| | Casting, GOST 977-88 | 638 | 392 | 14 | 30 | 491 | 3 further values are held for this grade under a condition the source did not name — a bound with no quantity attached. They are withheld rather than shown against a guessed condition. Every figure holds only for the condition on its own row. Values are never merged across conditions or across sources, never averaged, and never interpolated between two rows. An em dash means no value on file — never zero. Figures are converted to the unit in the column header; the source’s own wording is kept and shown where the two differ. ## Similar grades — and why Selection rule, stated so you can disagree with it: same number class 1.1, a shared category, and a published range for Mn / Si that overlaps this grade’s. These are neighbours in composition space — they are not equivalents, and none is claimed to be interchangeable with this grade. [38Mn6 1.1127 Mn 1,40-1,65 · Si 0,15-0,35 - ΔMn 0.02 - ΔSi 0.05 - 10 designations](/materials/din-en/38mn6 "38Mn6")[1.1170 1.1170 Mn 1,30-1,65 · Si ≤0,40 - ΔMn 0.02 - ΔSi 0.10 - 44 designations](/materials/material-no/1.1170 "1.1170")[30Mn5 1.1173 Mn 1,20-1,50 · Si 0,15-0,40 - ΔMn 0.15 - ΔSi 0.02 - 10 designations](/materials/din-en/30mn5 "30Mn5")[26Mn5 1.1161 Mn 1,20-1,50 · Si ≤0,40 - ΔMn 0.15 - ΔSi 0.10 - 7 designations](/materials/din-en/26mn5 "26Mn5")[1.1167 1.1167 Mn 1,20-1,50 · Si ≤0,40 - ΔMn 0.15 - ΔSi 0.10 - 82 designations](/materials/material-no/1.1167 "1.1167")[20Mn5 1.1133 Mn 1,00-1,50 · Si ≤0,40 - ΔMn 0.25 - ΔSi 0.10 - 71 designations](/materials/din-en/20mn5 "20Mn5") ## Looking for this grade under another name? Search the catalogue by designation, material number or composition — every name on this page is itself a way in. [Search](/search "Steel grade search")[Inquiry](/inquiry?material=4899dde4-9633-4d2f-a2c8-a0ae635689a6&designation=89692c26-126a-4281-8fa3-8d9e8e25c923 "Inquiry")[**Datasheet as PDF** Print-ready A4 document **Generating …** **Download started** **Try again**](/materials/bs/en15a.pdf "Datasheet as PDF")